The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2013
Filed:
Aug. 11, 2010
Applicant:
Chia-chou Yeh, Gardena, CA (US);
Inventor:
Chia-Chou Yeh, Gardena, CA (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and systems are provided for diagnosing faults of a rotor of an electric motor. A current is obtained for an inverter using a sensor. A preliminary angle is determined by a control unit or processor using a resolver angle of the rotor. A transformation is conducted by the control unit or processor using a transformation angle that is equal to a multiplier multiplied by the preliminary angle. A fault condition is identified via the control unit or processor using the transformation.